Calculate ASCE 7-22 C&C design pressures for every opening, match them to your NOA / product approval, and export a permit-ready Engineering Report. Calculating wind loads since 2002.
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The software produces the Engineering Report. When you need a stamp, our PE network signs and seals nationwide — Florida work up to three stories by our in-house Florida P.E., other states routed to a licensed engineer there. Sealing is a separate professional service.
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Three things generalist software gets wrong on windows, doors, and shutters — and we get right.
We return the required positive and negative design pressures for each window, door, and shutter. Then compare them against the rated DP on the approval.
A mulled assembly is not one calc. We check each tributary unit, the mullion carrying both tributary areas, and the wall opening itself.
Florida Building Code context is built in, and a licensed P.E. can sign and seal the result anywhere in the country.
A guided C&C workflow for window, door, and shutter openings.
Enter the project address. Design wind speed and the ASCE edition load automatically.
Set dimensions, roof height, and exposure (B, C, or D). Validation catches errors.
Add each window, door, or shutter with its size, zone, and effective wind area.
Compare required DP to your approval, then export the Engineering Report.
Built for everyone who has to prove an opening meets the wind requirement.
Calculate design pressures for impact-rated, vinyl, and aluminum-frame installs, and submit permits with confidence.
Size entry, French, and sliding glass doors to the wind requirement for residential and commercial work.
Run accordion, roll-down, and panel systems — critical for hurricane-prone coastal and HVHZ regions.
Specify openings with accurate C&C pressures and hand clean calculations to contractors and reviewers.
Review applications and verify contractor calculations against ASCE 7 with traceable coefficients.
Verify a product's rated DP meets a project requirement before fabrication and shipping.
No paid testimonials — just a verifiable 24-year track record.
Replacement and new-construction windows, sliding glass doors, French doors, entry and storm doors, plus accordion, roll-down, and panel hurricane shutters. Both impact-rated and non-impact products are supported as Components & Cladding.
The calculator returns the required positive and negative C&C design pressures for each opening, then you compare them to the rated DP on the NOA or product approval. A clear pass or fail flags any opening whose approved DP is below the required pressure.
Yes. A mulled assembly is one opening with three load checks: each tributary unit, the mullion carrying both tributary areas, and the wall opening itself. Sizing anchors for a single unit when two are mulled is a common pullout-failure cause, so all three are checked.
ASCE 7-22, the current standard. Most jurisdictions are on 7-16 today, while 7-22 adoption is growing — confirm the adopted edition with your building department.
Yes. It applies Florida Building Code context including the High-Velocity Hurricane Zone for Miami-Dade and Broward, the wider wind-borne-debris region, and the 4-foot edge-strip minimum required in Florida. Miami-Dade NOA matching is built in.
A permit-ready Engineering Report with design wind speed, exposure category, topographic and elevation factors, zone diagrams, per-opening required pressures, and DP-to-approval comparisons. Export to PDF, Excel, CSV, or print — with optional company branding.
Yes. PE sign-and-seal is available in all 50 states through our PE network. Florida work up to three stories is handled by our in-house Florida P.E.; projects elsewhere are routed to a licensed engineer in that state. Sealing is a separate professional service from the software.
Our reports carry a 100% permit-approval record across 24 years. Building officials recognize the professional format and complete ASCE 7 documentation, and PE sign-and-seal is available on request.
No. It is built for engineers, contractors, installers, and product specialists. The step-by-step interface guides each input with tooltips and built-in ASCE 7 references. Understanding basic C&C concepts helps when interpreting results.
Yes. Cancel anytime from your account dashboard. Access continues through the end of your paid billing period, with no cancellation fees and a 7-day money-back guarantee on new subscriptions.
Run a real opening on a 7-day free trial, match its design pressure to your approval, and export a permit-ready report. Or try our free wind speed lookup first.